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Science International Vol. 1 (5), 2013
Research Article
Appraisal of Eighteen Silkworm (Bombyx mori L.) Genotypes Using Pre and Post Cocoon Characters
Ebrahim Talebi and Shivakumar Bakkappa
 
Abstract: This study was done on simultaneously reared silkworm genotypes over four consecutive years (2004-2007) and at different seasons. Eighteen silkworm genotypes were tested in the study from bivoltine, multivoltine and mutants from the Germplasm Bank of DOS in Sericulture Science, University of Mysore, Mysore. Analysis of variance was done for nine quantitative pre and post cocoon characters in eighteen silkworm genotypes, results clearly showed that all nine economic traits exhibited highly significant difference. The highest record for mean hatching percentage was from the G111 genotype at 98.51% and the MU1 race revealed the least mean value of 98.02%.Genotypes MG414 (3.79 g) and PM (661 h) exhibited maximum evaluations for larval weight and larval duration, respectively. Results of this investigation provide information on morphological dissimilarity among silkworm strains calculated from the generalized distance, which is an extension of the Euclidian distance. The dendrogram UPGMA, produced from the cluster analysis, demonstrated two distinct clusters, divided in terms of having genetic distances 0.45 to 3.27 from the respective clusters and the genetic architecture of traits is used as a key for evolutionary geneticists.
 
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